Functions and Characteristics of Shear Pumps in Drilling Fluid Solid-Control Equipment

　　A mud shear pump (drilling fluid shear pump) is a shear device composed of a shear pump body and a shear hopper, designed to provide intense shear for the rapid hydration of polymeric polymers (and also clays), thereby reducing the shear rate of the drilling fluid and enhancing gel strength. Our editor will now explain this in detail. Drilling Fluid Solid Control Equipment —Functions and characteristics of the shear pump.

　　High-molecular-weight polymers used in drilling mud have a high polymer concentration and are difficult to hydrate when added directly. If shear is insufficient, the polymers may clog the shaker screens during the first circulation, resulting in substantial polymer loss, increased drilling costs, and difficulty in removing large solid particles from the drilling fluid. In the drilling fluid, inadequate shear can lead to the formation of numerous “fish eyes” within the polymer, which can damage the formation, reduce formation permeability, and decrease hydrocarbon production. Therefore, it is necessary to pre-shear the polymers before introducing them into the drilling fluid system to enhance fluid performance and fully realize their beneficial effects. Shear pumps can provide high shear.

　　 Drilling Fluid Solid Control Equipment Characteristics and advantages of the shear pump:

　　1. Save more than 30% of bentonite and rapidly dilute, shear, and hydrate the polymer.

　　2. Provide high displacement and lift to meet the requirements for mud preparation and treatment.

　　3. Greatly enhances the hydration degree of bentonite.

　　Shear Pump Function

　　1. It can facilitate rapid shear-thinning and hydration of the polymer.

　　2. Greatly enhances the hydration of soil-moving particles.

　　3. Provide high displacement and head to meet the requirements for mud preparation and treatment.

　　In addition, the mud mixer is a piece of equipment in the tank-type solids-control system for drilling fluids. Its primary function is to agitate and mix the drilling fluid, preventing solid particles from settling within the tank-based circulation system, thereby maintaining stable circulating-fluid properties and ensuring uniform mixing. The drilling-fluid solids-control mixer consists of four main components: an explosion-proof motor, a reducer, a base frame, and an impeller assembly. The motor is rigidly coupled to the reducer, and the reducer is rigidly coupled to the impeller shaft; the impeller is fabricated by welding together four blades.

　　A mud mixer is a continuous and reliable solid-control system for drilling fluids, designed to maintain the uniformity of the drilling fluid and keep solid particles in suspension. It is primarily used for stirring and blending drilling fluids, preventing the settling of solid particles within the tank circulation system, thereby ensuring stable circulating fluid properties and uniform mixing.

　　 Drilling Fluid Solid Control Equipment The mixer primarily consists of an explosion-proof motor, a reducer, a base, and an impeller assembly. The agitator blade generates a vortex in the liquid, thereby enhancing the mixing effect. Additionally, the tray positioned between the blades prevents solid particles in the slurry from settling around the lower blades when the equipment is shut down, reducing the resistance torque exerted by these deposits during startup and thus avoiding motor burnout due to starting overloads.